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TXU0202DCUR

2-bit fixed-direction level translator, opposite channels, 200Mbps, 1.1-5.5V, Schmitt-trigger, VSSOP-8

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Manufacturer Part：

TXU0202DCUR

Package：

VSSOP-8 (DCU) 2x3.1 mm

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Description

Product Overview

The TXU0202DCUR from Texas Instruments is a 2-bit dual-supply fixed-direction voltage-level translator in a VSSOP-8 (DCU) package. With opposite-direction channels (A1-to-B1 and B2-to-A2), Schmitt-trigger inputs, integrated pull-down resistors, and support for 1.1V to 5.5V rails at up to 200 Mbps, it is ideal for UART, SPI, and general-purpose I/O level shifting.

Key Specifications

Channels 2 (opposite direction)
Data Rate 200 Mbps (3.3V to 5V)
Voltage Range 1.1V – 5.5V (both ports)
Direction Fixed: A1->B1, B2->A2
Input Type Schmitt-trigger
Propagation Delay 10 ns (typical)
Drive Strength 12 mA @ 5V
Quiescent Current 2.5 uA max (25 deg C)
Package VSSOP-8 (DCU) 2×3.1 mm
Temperature -40 to +125 deg C

Features

  • Opposite-direction channels ideal for UART TX/RX level shifting
  • Schmitt-trigger inputs tolerate slow and noisy input signals
  • Integrated static pull-down resistors prevent floating channels
  • VCC isolation and VCC disconnect (Ioff-float) for power sequencing
  • Pin-compatible with TXB family level shifters

Applications

  • UART level shifting between MCU and USB-to-serial chips
  • SPI and JTAG interface voltage translation
  • General-purpose I/O level shifting in multi-voltage systems
  • Driving indicator LEDs and buzzers across voltage domains
  • Mechanical switch debouncing with Schmitt-trigger inputs

The TXU0202 is a 2-bit dual-supply noninverting fixed-direction voltage-level translator from Texas Instruments, designed with opposite-direction channels (A1-to-B1 and B2-to-A2) making it ideal for UART and other bidirectional bus level shifting. The A port operates from 1.1V to 5.5V (VCCA) and the B port from 1.1V to 5.5V (VCCB). Schmitt-trigger inputs provide noise immunity on slow signals, while integrated pull-down resistors prevent channels from floating when not driven. The OE pin with VCC(MIN) circuitry allows control from either supply domain. VCC isolation and Ioff-float features ensure glitch-free operation during power sequencing.

The TXU0202 uses dual-supply level-shifting buffers between VCCA and VCCB domains. Channel 1 transmits from A1 to B1, while Channel 2 transmits from B2 to A2, providing opposite-direction paths on a single device. The OE (output enable) pin, referenced to either VCCA or VCCB via internal VCC(MIN) circuitry, controls the tri-state of all outputs. When OE is LOW, all outputs enter high-impedance state. When OE is HIGH, data flows through the enabled channels. Schmitt-trigger inputs on all data pins provide hysteresis for noise rejection on slowly transitioning signals. If either VCC drops below 100 mV or is disconnected, all outputs are disabled and become high-impedance.

Pin Name Type Function
1 VCCA Power A-port supply (1.1-5.5V)
2 A1 Input Channel 1 input (A to B direction)
3 B2 Input Channel 2 input (B to A direction)
4 GND Power Ground
5 OE Input Output enable (active high)
6 A2Y Output Channel 2 output (B-to-A)
7 B1Y Output Channel 1 output (A-to-B)
8 VCCB Power B-port supply (1.1-5.5V)
  • UART level shifting: opposite channels match TX/RX directions perfectly
  • MCU to USB-serial bridge: translate between 1.8V MCU and 3.3V bridge
  • SPI interface: fixed direction for CLK/MOSI/MISO translation
  • LED/buzzer driving: 12 mA drive strength across voltage domains
  • Noisy signal conditioning: Schmitt-trigger cleans slow edges
Manufacturer Part Number Package Notes
TI TXU0102DCUR VSSOP-8 Same direction channels variant
TI TXB0102DCUR VSSOP-8 Auto-direction version, pin-compatible
TI TXU0202DTTM X2SON-8 Ultra-small 0.8×1.35mm package
Nexperia 74LVC2T814DC VSSOP-8 Similar dual translator
onsemi NXS0102QBX QFN-8 2-bit level translator
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